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I Heating Drum. v No. 70,138. Patented Oct, 22, 1867.

"-PETERS, PAOTO-LITHOGRAFHEE WASHINGTON, D. C.

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Letters Patent No. 70,138, dated October 22, 1867.

STOVE-PIPE DRUM.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JEROME C. WARD, of Bergen, in the county of Genesee, and State of New York, have invented a certain new and useful Improvement in Stove-Pipe Drums; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

Figure 1 is a perspective view of my improved drum, with a part broken away to show the dampers.

Figure 2, a central vertical section of the same.

Like letters of reference indicate corresponding parts in both figures.

My invention consists in the combination of two elongated dampers situated within the drum, connected outside by a rod, so as to receive a simultaneous action, and so arranged that the same effect of an indirect passage is produced as where partitions are employed in the drum.

As representedin the drawings, A is the drum, and B B'the dampers. These dampers are made of much more than the ordinary length, extending, in fact, nearly the length of the drum itself. They are hung on shafts O G, which extend out through the side of the drum, and have crank-arms, a a, which are connected by a. connecting-rod, b. I prefer to cast these dampers with eyes 0 0, formed as shown in the drawings, so that the shafts can be simply slipped in. When the dampers are closed, as in fig. 2, the edges of the same conform to the outline of the interior of the drum, or, in other words, fit the walls. The tops of the lower and the bottoms of the upper dampers are, however, clipped off square, or otherwise formed so as to leave passages d d for the passage of the draught. Thus it will be seen that when the dampers are in the position shown in black lines, fig. 2, an indirect passage will be produced, as indicated by the arrows, but when in the position indicated by red lines, a direct passage will be produced. By this arrangement of the elongated dampers, I give an indirect passage which extends nearly the length of the drum itself, and which, in fact, can be extended any desired length, This produces the same effect that is produced where partitions are used in the drum with a small valve at top and bottom. By this constructiond lessen the expense, since the dampers are cast so as to fit accurately, and require no fitting, while, if partitions aroused, they must be riveted in place, which requires much labor, and when this is done, dampers mustbe employed, which in themselves are nearly or quite as costly as mine. The connection 6 between the dampers insures their simultaneons action, and necessitates but one movement to adjust both dampers; This is essential to the perfect working of the drum. Both have to close accurately to cut off and give proper direction to the draught. The dampers in this case differ from those in other cases, being elongated so as to simply close against the sides of the drum, instead of turning freely, thereby giving an indirect draught nearly the whole length of the drum, and in being connected in such a manner as to receive a simultaneousaction. These features combined, I believe to be original with myself.

I am aware that two turning dampers have before been connected by a rod, 6, but in such case interior partitions have-been used with the drum. Such I do not claim.

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the two elongated dampers B' B, connected by rod 6 with the drum A, without partitions, the whole operating in the manner and for the purpose specified.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

,JEROME WARD.

Witnesses:

ELBERT W. PARMELEE, I. D. DOOLITTLE. 

